save a bp with cables and spline mesh in GLTF file

i need help for my project in which i need to save in gltf file or fbx the content of a BP.
there are spline mesh actors and cables inside BP.
i don’t see when i export in gltf, why?

which is the correct procedure to creare fbx or GLTF file°?

i need a programmer to do it, please contact me.
it is urgent!!!

i will pay for it…